package com.superteam.zzl.Des;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.drawable.Drawable;

/**
 * Created by Administrator on 2017/1/13.
 */
public class ImageUtils {



        //放大缩小图片
        public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h){
            int width = bitmap.getWidth();
            int height = bitmap.getHeight();
            Matrix matrix = new Matrix();
            float scaleWidht = ((float)w / width);
            float scaleHeight = ((float)h / height);
            matrix.postScale(scaleWidht, scaleHeight);
            Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);
            return newbmp;
        }
        //将Drawable转化为Bitmap
        public static Bitmap drawableToBitmap(Drawable drawable){
            int width = drawable.getIntrinsicWidth();
            int height = drawable.getIntrinsicHeight();
            Bitmap bitmap = Bitmap.createBitmap(width, height,
                    drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
                            : Bitmap.Config.RGB_565);
            Canvas canvas = new Canvas(bitmap);
            drawable.setBounds(0,0,width,height);
            drawable.draw(canvas);
            return bitmap;

        }

        //获得圆角图片的方法
        public static Bitmap getRoundedCornerBitmap(Bitmap bitmap,float roundPx){

            Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap
                    .getHeight(), Bitmap.Config.ARGB_8888);
            Canvas canvas = new Canvas(output);

            final int color = 0xff424242;
            final Paint paint = new Paint();
            final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
            final RectF rectF = new RectF(rect);

            paint.setAntiAlias(true);
            canvas.drawARGB(0, 0, 0, 0);
            paint.setColor(color);
            canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

            paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
            canvas.drawBitmap(bitmap, rect, rect, paint);

            return output;
        }
        //获得带倒影的图片方法
        public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap){
            final int reflectionGap = 4;
            int width = bitmap.getWidth();
            int height = bitmap.getHeight();

            Matrix matrix = new Matrix();
            matrix.preScale(1, -1);

            Bitmap reflectionImage = Bitmap.createBitmap(bitmap,
                    0, height/2, width, height/2, matrix, false);

            Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height/2), Bitmap.Config.ARGB_8888);

            Canvas canvas = new Canvas(bitmapWithReflection);
            canvas.drawBitmap(bitmap, 0, 0, null);
            Paint deafalutPaint = new Paint();
            canvas.drawRect(0, height,width,height + reflectionGap,
                    deafalutPaint);

            canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);

            Paint paint = new Paint();
            LinearGradient shader = new LinearGradient(0,
                    bitmap.getHeight(), 0, bitmapWithReflection.getHeight()
                    + reflectionGap, 0x70ffffff, 0x00ffffff, Shader.TileMode.CLAMP);
            paint.setShader(shader);
            // Set the Transfer mode to be porter duff and destination in
            paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
            // Draw a rectangle using the paint with our linear gradient
            canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()
                    + reflectionGap, paint);

            return bitmapWithReflection;
        }

    }